You are foolish for even paying for it. Not too long ago a bunch of Americans were suckered into this one also on ebay, but they paid a lot more than what you did. It would be impossible to experience a 14kw gain from a simple resistor, for gains like that on a naturally aspirated car you would need a very well tuned aftermarket fuel map be it on a replacement chip or a piggy back unit. Next time that you see something like this for sale, dont hesitate to ask here first before putting some of your hard earned on the table for something that it quite simply a scam. Things like resistors and electronic superchargers fit into this scam category.
Dont be offended however, if like this thread you get a reply and the thread is locked by admin.